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SHAREHOLDERS' EQUITY (Tables) | 12 Months Ended
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Dec. 31, 2019
Stockholders' Equity Note [Abstract] |
Schedule of Stock Options Assumptions | The fair value of the Company’s stock options granted under the 2012 plan for the years ended December 31, 2019, 2018 and 2017 was estimated using the following assumptions:
|  | 2019 |  | 2018 |  | 2017
Expected stock price volatility |  | 34.2% – 36.8% |  | 32.6% – 40.8% |  | 33.3% – 40.5%
Expected option life (in years) |  | 3.5-5 |  | 3.5-5.5 |  | 4 – 5.5
Risk free interest rate |  | 1.44% – 1.63% |  | 1.71% – 2.87% |  | 1.49% – 1.81%
Dividend yield |  | 0% |  | 0% - 5% |  | 5%
Schedule of Stock Option Activity |
|  | The following table is a summary of the activity of TAT's Stock Option plan:
|  | Year ended December 31, |  |  | Year ended December 31, |  |  | Year ended December 31, |
|  | 2019 |  |  | 2018 |  |  | 2017 |
|  | Number of options |  |  | Weighted average exercise price |  |  | Number of options |  |  | Weighted average exercise price |  |  | Number of options |  |  | Weighted average exercise price |
Outstanding at the beginning of the year |  |  | 548,267 |  |  | $ | 9.03 |  |  |  | 365,000 |  |  | $ | 8.53 |  |  |  | 330,000 |  |  | $ | 7.97 |
Granted |  |  | 170,000 |  |  |  | 5.44 |  |  |  | 273,893 |  |  |  | 9.70 |  |  |  | 75,000 |  |  |  | 10.39 |
Forfeited |  |  | (126,808 | ) |  |  | 11.19 |  |  |  | (63,958 | ) |  |  | 9.85 |  |  |  | (20,417 | ) |  |  | 7.47 |
Exercised |  |  | - |  |  |  | - |  |  |  | (26,668 | ) |  |  | 7.15 |  |  |  | (19,583 | ) |  |  | 7.3 |
Outstanding at the end of the year |  |  | 591,459 |  |  |  | 7.53 |  |  |  | 548,267 |  |  | $ | 9.03 |  |  |  | 365,000 |  |  | $ | 8.53 |
Exercisable at the end of the year |  |  | 264,389 |  |  | $ | 7.74 |  |  |  | 163,438 |  |  | $ | 8.34 |  |  |  | 120,417 |  |  | $ | 7.95 |

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- Definition Tabular disclosure for stock option plans. Includes, but is not limited to, outstanding awards at beginning and end of year, grants, exercises, forfeitures, and weighted-average grant date fair value. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (d) -URI http://asc.fasb.org/extlink&oid=116856206&loc=d3e5070-113901 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (e) -URI http://asc.fasb.org/extlink&oid=116856206&loc=d3e5070-113901 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c)(1) -URI http://asc.fasb.org/extlink&oid=116856206&loc=d3e5070-113901 + Details
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- Definition Tabular disclosure of the significant assumptions used during the year to estimate the fair value of stock options, including, but not limited to: (a) expected term of share options and similar instruments, (b) expected volatility of the entity's shares, (c) expected dividends, (d) risk-free rate(s), and (e) discount for post-vesting restrictions. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (f)(2) -URI http://asc.fasb.org/extlink&oid=116856206&loc=d3e5070-113901 + Details
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